3 运动定律与简便运算
直接写出得数.
÷3=
+
= 1.25×16= 342﹣99= 45×30%=
×
= 0.01×27= 9.6÷0.25÷4= (
+
﹣
)×24= 1.9+1.1﹣1.9+1.1=
4
×1
+45×
8400﹣108×42. 5+3.5÷0.5×5.2
(1+0.78×
)÷(145+
) [2
+2.4×(1
﹣1.5)]÷1.1 (12+999+99)÷[56×(
﹣
)].
直接写出计算结果:
41×101= 8.1÷3×2= 23﹣2.03﹣2.003= 65÷1.3=
(63+45)×
=
×4÷
×4= 75×10%= 5﹣4÷
=
直接写得数.
a﹣0.06a= 4×6÷4×6= 52÷2.6=
+37.5%=
7.2×
= 4×25%= 7.86×99+7.86= 3.14×202=
选择适当的方法计算
36×5.76+0.36×424 7.05×37+64×7.05﹣7.05 248﹣52
﹣22
36×(
+
﹣
) [1﹣(
+
)]÷
.
脱式计算(能简算的要用简便方法计算).
1
÷2.4﹣1.6×
3.95×9
+
×3.95
20
﹣3
﹣16
1
×(2
﹣1.6)+15%
3
÷(3﹣2.4×
) 8.75÷[0.5×(1
﹣1
)].
脱式计算.(能简单的要简算)
(1)(2
+2
+2
+2
)×0.25 (2)8×4×12.5×0.25
(3)
×[
﹣(
+0.25)] (4)(5﹣3.75)÷(
+
)÷1.2.
直接写出得数.
×8=
÷2=
÷
=
×
=
×
=
1÷
=
÷60%=
×15=
﹣
= 6.8÷10%=
4.5+
=
×
=
×2=
÷
=
+
=
4×(
+
)= 1÷37.5%= 5÷5÷
= 32﹣32×
= (
﹣
)×20=
直接写出结果
①4﹣3.06= ②13+14= ③125×3×8= ④1÷0.25= ⑤100﹣17=
⑥(
﹣
)×20= ⑦25﹣5÷20%= ⑧13﹣4.7﹣3.3= ⑨
×12+1= ⑩
×8+8×
=
计算下面各题.
(1)递等式计算:
36÷〔(
﹣
)×3〕
(2)解方程:
17.5﹣5(x+0.5)="9x"
(3)简便计算:
(87.2+87.2+87.2×2)×25 765×213÷27+765×327÷27.
直接写上得数:
①25×1.25×32= ②1÷
+
= ③0.5× =
④12.88+
+
+
= ⑤0.8×99+
= ⑥
﹣0.01+0.375=
⑦3.6×(1﹣
﹣
)= ⑧4.5×101= ⑨500×0.2%=
直接写得数,看谁快又准.
÷2= ; 5﹣0.25+0.75= ; 9﹣0.09= ; 0.4×16×0.25= ;
﹣
+
= ; 4.5×102= ; 23.9÷8≈ ; 1÷
×
= ;
0.42﹣0.32= ; 13×(2+
)= ; 7×
÷7×
= ; 0.9+99×0.9= .
计算,能简算的要简算
(1)4.82﹣5.2÷0.8×0.6 (2)125×32 (3)6760÷13+17×25
(4)57.5﹣4.25﹣15.75 (5)
×16.31﹣
×2.31.





+5.5×80%+0.8 8
÷[7.8+
×(2.75+1.25)]
.
﹣10
(2)(
+
﹣
)×36
﹣3.8﹣6
+4
(4)0.38+2.62﹣
﹣1
.
.
, 
1.25×16×2.5
.
.
﹣
×(
+
)]÷
:0.6
×1.2﹣
+
+
.
÷〔
﹣(
﹣
)〕 1375+450÷18×25
×
+25%×
×
÷
÷〔(
﹣
)×
〕
÷
+87.25×
)+3.6]
)÷[(21.74﹣
)×
].
+
÷
×
+
+
)×24 17.5×52÷25 〔2﹣(
+
)〕×
.
×
)÷
×
+0.75×35% (
+
)×4+
.
÷
3.9×0.1÷3.9×0.1 0×4.5×101.52
÷
2.9+3.2 10.1﹣1.
+
)÷
+
×67+26×
.
+6
+(
﹣
)÷
;
×
×15×9;
×
+
×
.
﹣
+
﹣
+
﹣
×17.6+36÷
+2.64×12.5.
+
)×10×6 (
﹣
)÷(4÷
)
)]÷1.3
×[
﹣0.25)].
=
=
=
x+
x=60.
+0.24×5
×9.4+
×0.7﹣70% 178×
)+2.5] (4.8×7.5×8.1)÷(2.4×2.5×2.7)
+
+
+…+
.
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