题目内容
| 简便计算. 3.6÷4+7.4×
| (
| 403×101=12.5×32×2.5= | ||||||
99×
| 16.78-3.4-4
|
(1)3.6÷4+7.4×
-25%,
=3.6×
+7.4×
-
,
=(3.6+7.4-1)×
,
=10×
,
=2.5;
(2)(
+
)×15×17,
=
×15×17+
×15×17,
=34+45,
=79;
(3)403×101,
=403×100+403×1,
=40300+403,
=40703;
(4)12.5×32×2.5,
=(1.25×8)×(4×2.5),
=10×10,
=100;
(5)99×
+
,
=(99+1)×
,
=100×
,
=25;
(6)16.78-3.4-4
=16.78-(3.4+4.6),
=16.78-8,
=8.78.
| 1 |
| 4 |
=3.6×
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
=(3.6+7.4-1)×
| 1 |
| 4 |
=10×
| 1 |
| 4 |
=2.5;
(2)(
| 2 |
| 15 |
| 3 |
| 17 |
=
| 2 |
| 15 |
| 3 |
| 17 |
=34+45,
=79;
(3)403×101,
=403×100+403×1,
=40300+403,
=40703;
(4)12.5×32×2.5,
=(1.25×8)×(4×2.5),
=10×10,
=100;
(5)99×
| 1 |
| 4 |
| 1 |
| 4 |
=(99+1)×
| 1 |
| 4 |
=100×
| 1 |
| 4 |
=25;
(6)16.78-3.4-4
| 3 |
| 5 |
=16.78-(3.4+4.6),
=16.78-8,
=8.78.
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