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÷
=
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.