题目内容
这样简便就怎么算
| 27÷0.35×1.3 | 19-18.9÷1.4 | 125×408 |
| 0.25×1.25×32 | 0.4×98+0.8 | 12.5×1.7+8.3×12.5. |
(1)27÷0.35×1.3
=
×1.3
=
(2)19-18.9÷1.4
=19-13.5
=5.5
(3)125×408
=125×(400+8)
=125×400+125×8
=50000+1000
=51000
(4)0.25×1.25×32
=(0.25×4)×(1.25×8)
=1×10
=10
(5)0.4×98+0.8
=0.4×98+0.4×2
=0.4×(98+2)
=0.4×100
=40
(6)12.5×1.7+12.5×8.3
=12.5×(1.7+8.3)
=12.5×10
=125
=
| 540 |
| 7 |
=
| 702 |
| 7 |
(2)19-18.9÷1.4
=19-13.5
=5.5
(3)125×408
=125×(400+8)
=125×400+125×8
=50000+1000
=51000
(4)0.25×1.25×32
=(0.25×4)×(1.25×8)
=1×10
=10
(5)0.4×98+0.8
=0.4×98+0.4×2
=0.4×(98+2)
=0.4×100
=40
(6)12.5×1.7+12.5×8.3
=12.5×(1.7+8.3)
=12.5×10
=125
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