3 运动定律与简便运算
用递等式计算下列各题,能简算的要简算.
①37×40+1035÷23 ②86.5×2.4÷0.3﹣690
③2.8+[2.4÷(90﹣60)] ④46.5×43.5+43.5×27.5﹣25×43.5
⑤
×
+
×
⑥0.4×7+
×3﹣0.4×3.
脱式计算.
(1)1500﹣450÷18×25 (2)7.6×3.8+7.6×5.2+7.6 (3)(
+
)×35+
(4)22×34×
×
(5)19﹣
+11﹣
(6)
÷[
×(
+
)].
脱式计算,能简算的要简算.
762﹣408÷4×5 35×
+
×14 1.5×[0.02÷(2.1﹣2.09)]
12.5×8.8 87.58﹣(7.58+3.8) (
+
)×4+
.
脱式计算,能简算的要简算.
①10962÷54﹣105 ②0.25×(4.8﹣7.5÷3) ③0.65+2
+6.35+
④
×
÷(
﹣
) ⑤9.07×93﹣9.07+9.07×8 ⑥0.125×(5+0.8)+0.125÷
.
“巧思妙算”﹣﹣用你喜欢的方法计算.
①450÷18×30+375 ②6.75×2.4+4.25×2.4﹣2.4
③(0.75+0.2)÷0.25×25% ④
×〔
﹣(
﹣
)〕
递等式计算.(能简便运算的要用简便方法计算)
14760÷36﹣24×11 5.2×4.5+4.5×3.8+4.5 12.5×25×0.4×0.8
5﹣(
÷
+
) 4.8÷16+〔1÷(5
﹣5.09)〕 [4.2+(5.36﹣1.2)÷0.26]÷20.
简算:
①57.5﹣14.25﹣15
②102.31×59
③(
×10.68+8.52×
)÷1
④0.1+0.2+0.3+0.4+…+0.9+0.1+0.11+0.12+…+0.98+0.99.
计算下面各题,能简算的要简算
1243﹣1334÷23×12 2×3.14×8×5+3.14×82 8.86﹣5.29﹣1.71﹣1.86
+(1﹣
)×
÷
85×0.75+16×75%﹣
.
÷[
×﹙
+
﹚] ④(1﹣
÷
﹚×
.
×
+
÷
1﹣
÷
﹣
﹣(
÷
+
)
+
÷
÷〔2﹣(
+
)〕
+
﹣
)×24 ④
÷[(
)×
].



.
+
)÷
﹣
.
×
+
÷
(
+
)÷
﹣
.
﹣
+
)×48 ④7.8÷[32×(1﹣
)+3.6].
+
﹣
)
÷(4﹣2.4×
)
÷9+
×
5.58﹣
+5.42﹣
.
﹣
÷
+
×
+(
﹣
5.8+1.34+0.66+4.2.
﹣
﹣
6.58×
+3.42÷
﹣
)÷
[4+(
﹣0.75)÷
]×
.
.
+
+
+
)
+
+
+
+
+
+
.
+0 6.
×[(
﹣
)÷
]
+
×(
﹣
)
+
.
﹣
+
2.01×1001﹣2.01 (
)÷
×[1÷(
﹣
)] 2+1÷(1﹣
)
×
+0.4×7
﹣
)×17×15.
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