小学数学知识集锦

)

小数加减法计算法则计算小数加减法，先把 小数点对齐

(

也就是把相同

的数位上的 数对齐

)

，再按照整数加减法则进行计算，最

< br>head-end processing to

be connected into a thread. With hood protection: using special steel

wire protective cap to protect the steel wire to prevent screw thread

bump or contaminated with dirt. Classification code according to the

specifications and type (2), connector connector steel steel wire under

the screw head caps in place ? ? joints tighten ? mark ? intented for

operation steel in place: carry the yarn inspection of steel bars to

stay connected. Connector tighten: with a wrench and pipe wrench tighten

the connector. Mark: Mark already screwed joints, apart from not tighten

the joints of steel bar connection diagram: 2, steel connection in steel

connections, steel specifications should be consistent with connection

sleeve specifications and ensure yarn and threads clean and intact

within the connecting sleeve. Alignment axis when connecting

reinforcement the steel twisted into the corresponding connection socket.

Joint splicing is complete, two head pushing each other in the sleeve of

the central location, sleeve at each end Ruth clasp 1~2 clasp, extended

number of exposed threaded joints without restrictions, but there are

clearly marked, to check whether the enter sleeve length to meet the

requirements. Reinforced joints applied after tightening torque

tightening torque wrench by not less than the table value check Check,

and mark. Joint of rolling straight threads rebar diameter tightening

torque values/mm ? 18~20 ? 22~25 ? 28~32/tightening torque values (N ? m)

160 230 300 Note: when different diameter rebar

后在得数里对齐横线上的小数点位置，点上小数点。

(

十五

)

小数乘法的 计算法则计算小数乘法，先按照乘法的法则算出积，再看因

数中一共几位小数，就从积的 右边起数出几位，点上小数点。

(

十六

)

除数是整数除法的法则除数是整数的小数除法，按照整数 除法的法则去

除，商的小数点要和被除数小数点对齐，如果除到被除数的末尾仍有余数， 就在余

数后面添

0

再继续除。

(

十七

)

除数是小数的除法运算法则除数是小数的除法，先移动除数小数点，使

它 变成整数

;

除数的小数点向右移几位，被除数小数点也向右移几 位

(

位数不够在被

除数末尾用

0

补足

)

然后按照除数 是整数的小数除法进行计算。

(

十 八

)

解答应用题步骤

1

、弄清题意，并找出已知条件和所求问题，分析题里

的数量关系，确定先算什么 ，再算什么，最后算什么

;

2

、确 定每一步该怎样算，列出算式，算出得数

;3

、进行检验，写出 答案。

(

十九

)

列方程解应用题的一般步骤

1

、 弄清题意，找出未知数，并用

X

表

示< /p>

;2

、找出应用题中数量之间的相等关系，列方程

;3

、解方程

;4

、检验、写 出答

案。

(

二十

)

同分母分数加减的法则同分母分数相加减，分母不变， 只把分子相加

减。

(

二十一

)

同分母带分数加减的法则带分数相加减，先 把整数部分和

head-end

processing to be connected into a thread. With hood protection: using

special steel wire protective cap to protect the steel wire to prevent

screw thread bump or contaminated with dirt. Classification code

according to the specifications and type (2), connector connector steel

steel wire under the screw head caps in place ? ? joints tighten ? mark ?

intented for operation steel in place: carry the yarn inspection of

steel bars to stay connected. Connector tighten: with a wrench and pipe

wrench tighten the connector. Mark: Mark already screwed joints, apart

from not tighten the joints of steel bar connection diagram: 2, steel

connection in steel connections, steel specifications should be

consistent with connection sleeve specifications and ensure yarn and

threads clean and intact within the connecting sleeve. Alignment axis

when connecting reinforcement the steel twisted into the corresponding

connection socket. Joint splicing is complete, two head pushing each

other in the sleeve of the central location, sleeve at each end Ruth

clasp 1~2 clasp, extended number of exposed threaded joints without

restrictions, but there are clearly marked, to check whether the enter

sleeve length to meet the requirements. Reinforced joints applied after

tightening torque tightening torque wrench by not less than the table

value check Check, and mark. Joint of rolling straight threads rebar

diameter tightening torque values/mm ? 18~20 ? 22~25 ? 28~32/tightening

torque values (N ? m) 160 230 300 Note: when different diameter rebar

分数部分分别相加减，再把所得的数合并起来。