题目内容
1735+4500÷18×15
3.8×4.5÷(3.2-2.95)
(
+
)÷
+
×9.4+
×30%
(
+
)×15×17.
3.8×4.5÷(3.2-2.95)
(
| 1 |
| 4 |
| 4 |
| 5 |
| 11 |
| 3 |
| 7 |
| 10 |
| 7 |
| 10 |
| 8 |
| 5 |
(
| 1 |
| 15 |
| 2 |
| 17 |
分析:算式(1)(2)(3)据四则混合运算法则计算即可.算式(4)可据分配律进行简算.
解答:解:(1)1735+4500÷18×15
=1735+250×15,
=1735+3750,
=5485;
(2)3.8×4.5÷(3.2-2.95)
=3.8×4.5÷0.25,
=17.1÷0.25,
=68.4;
(3)
×9.4+
×30%
=0.7×9.4+1.6×0.3,
=6.58+0.48,
=7.06;
(4)(
+
)×15×17
=
×15×17+
×15×17,
=17+30,
=47.
=1735+250×15,
=1735+3750,
=5485;
(2)3.8×4.5÷(3.2-2.95)
=3.8×4.5÷0.25,
=17.1÷0.25,
=68.4;
(3)
| 7 |
| 10 |
| 8 |
| 5 |
=0.7×9.4+1.6×0.3,
=6.58+0.48,
=7.06;
(4)(
| 1 |
| 15 |
| 2 |
| 17 |
=
| 1 |
| 15 |
| 2 |
| 17 |
=17+30,
=47.
点评:完成算式(3)时要注意式中两个乘法算式中没有相同的因数,不适用分配律.
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