(1)195÷195= ; (2)195÷195
=
(3)+
+
+…+
+
= .
简算
4.9+0.1﹣4.9+0.1
10.78﹣(2.78+3.693)
99.99×22.22+33.33×33.34
(2.5×2.5+2.5×2.5+2.5×2.5+2.5×2.5)×8.
简便计算
0.49×12.5×0.8; 5.61﹣5.61÷1.5; 0.45×78.2+20.8×0.45+0.45.
计算下面各题(能简算的要简算).
2.16÷(2.84+7.96)×0.8
37×9.99
45.7×3.9+5.43×39
[20.08+(32﹣29.9÷23)]÷2.
计算下列各题(能简算的要简算)
280÷5÷7
32×24÷64
630÷18.
1999+1998﹣1997﹣1996+1995+1994﹣1993﹣1992+1991+1990.
简便运算下面各题
125×25×32;
57×125+125×43.
计算下面各题,能简算的要简算,并写出简算过程.
①3.4×6.6+3.4×3.4
②1.45×99+1.45
③4.57﹣1.32+2.43﹣0.68
④6.48÷[(1.4﹣0.8)×0.9]
⑤25×(9.9×0.4)
⑥15.4﹣0.4÷4×25.
计算下面各题,能简算的要简算.
0.25×+2.5%
×[
+(
﹣
)]
×9.3+9.3×2.25
4.05﹣2.83﹣0.17.
用递等式计算(能简算的要简算)
(10﹣![]() ![]() |
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3.7×![]() ![]() |
(![]() ![]() |
计算下列各题,能简算的要简算:
(1)69.58﹣17.5+13.42﹣2.5
(2)×(
×19﹣
)
(3)+
+
+
(4)[1﹣(﹣
)]÷
.
计算下列各题能简算的要简算
①(+
)×15×17
②2011×
③777×9+37×111.