题目内容
脱式计算(能简便计算的要简算)
10.28+0.98+79.72+10.02
2700×(506-499)÷900
(
+
-
)×36
(0.65+
)÷
×4.8.
10.28+0.98+79.72+10.02
2700×(506-499)÷900
(
| 4 |
| 9 |
| 5 |
| 12 |
| 7 |
| 18 |
(0.65+
| 7 |
| 20 |
| 5 |
| 6 |
(1)10.28+0.98+79.72+10.02,
=(10.28+79.72)+(0.98+10.02),
=90+11,
=101;
(2)2700×(506-499)÷900,
=2700×7÷900,
=2700÷900×7,
=3×7,
=21;
(3)(
+
+
)×36
=
×36+
×36+
×36
=16+15+14
=45;
(4)(0.65+
)÷
×4.8
=(0.65+0.35)×
×4.8
=1×1.2×4.8
=5.76.
=(10.28+79.72)+(0.98+10.02),
=90+11,
=101;
(2)2700×(506-499)÷900,
=2700×7÷900,
=2700÷900×7,
=3×7,
=21;
(3)(
| 4 |
| 9 |
| 5 |
| 12 |
| 7 |
| 18 |
=
| 4 |
| 9 |
| 5 |
| 12 |
| 7 |
| 18 |
=16+15+14
=45;
(4)(0.65+
| 7 |
| 20 |
| 5 |
| 6 |
=(0.65+0.35)×
| 6 |
| 5 |
=1×1.2×4.8
=5.76.
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