3 运动定律与简便运算
用简便方法计算
9
﹣(
+
) 1.8×
+2.2×25% 6.9×99+6.9 67×101
2.5×32×0.125
﹣
+
﹣
10000÷125÷8 105×(
+
+
)
计算,能用简便计算就用简便计算.
(1)4.2﹣1.38+5.8﹣3.62
(2)
(3)
(4)0.125×0.25×32
(5)
(6)99.8×98+99.8×102.
.
×[
﹣(
﹣
)] [
﹣(
)]÷
.
(2)
.
×
+
×
+
﹣
)
×125×
×8 21×
+48×12.5%+11×
+4.25+6
+5.27 24×(
+
)
﹣
×128﹣2÷
.

.
.
49.5×13.5+50.5×13﹣0.5×49.5.
×16.31﹣
﹣
)×
﹣
) 
×
+
×
+
×
.
﹣
×
﹣
.
﹣2.25﹣
.
﹣

+
+
)×12
.
)÷2
(4)7
(6)5
.
+6.2﹣
;
×
+
×
;
+
)×12+
; 15.2﹣1.2÷0.16×0.84.
﹣
+
﹣
; (2)7.9×99+7.9.
)÷4
﹣
﹣
.
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