题目内容
怎样简便怎样算
58.7+24.79-18
6.8÷0.125÷0.8
23×
+57÷1
2.8×10.1.
58.7+24.79-18
| 7 |
| 10 |
6.8÷0.125÷0.8
23×
| 7 |
| 8 |
| 1 |
| 7 |
2.8×10.1.
①58.7+24.79-18
,
=58.7-18.7+24.79,
=40+24.79,
=64.79;
②6.8÷0.125÷0.8,
=6.8÷(0.125×0.8),
=6.8÷0.1,
=68;
③23×
+57÷1
,
=(23+57)×
,
=80×
,
=70;
④2.8×10.1,
=2.8×(10+0.1),
=2.8×10+2.8×0.1,
=28+0.28,
=28.28.
| 7 |
| 10 |
=58.7-18.7+24.79,
=40+24.79,
=64.79;
②6.8÷0.125÷0.8,
=6.8÷(0.125×0.8),
=6.8÷0.1,
=68;
③23×
| 7 |
| 8 |
| 1 |
| 7 |
=(23+57)×
| 7 |
| 8 |
=80×
| 7 |
| 8 |
=70;
④2.8×10.1,
=2.8×(10+0.1),
=2.8×10+2.8×0.1,
=28+0.28,
=28.28.
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