题目内容
| 脱式计算. (
| 9×3.6+2.9×6.4 | ||||||||||
(
| 7.25-3
| ||||||||||
| 0.75×99+0.75 | 3.6-2.8+7.4-6.2 |
(1)(
| 5 |
| 6 |
| 7 |
| 12 |
| 3 |
| 8 |
| 1 |
| 48 |
=(
| 5 |
| 6 |
| 7 |
| 12 |
| 3 |
| 8 |
=
| 5 |
| 6 |
| 7 |
| 12 |
| 3 |
| 8 |
=40+28+18,
=68+18,
=86;
(2)9×3.6+2.9×6.4,
=32.4+18.56,
=50.96;
(3)(
| 2 |
| 9 |
| 5 |
| 6 |
| 35 |
| 36 |
=
| 2 |
| 9 |
| 5 |
| 6 |
| 35 |
| 36 |
=8+30-35,
=38-35,
=3;
(4)7.25-3
| 3 |
| 7 |
| 4 |
| 7 |
=(7.25+3.75)-(3
| 3 |
| 7 |
| 4 |
| 7 |
=11-10,
=1;
(5)0.75×99+0.75,
=0.75×(99+1),
=0.75×100,
=75;
(6)3.6-2.8+7.4-6.2,
=(3.6+7.4)-(2.8+6.2),
=11-9,
=2.
练习册系列答案
相关题目