题目内容
| 脱式计算. 12÷25-23×710 | 85×25+85×85-10×85 | ||||||
| 32×25×125 | 37.8×19-9×37.8 | ||||||
| 8.7×101 | 1÷(
|
(1)12÷(25-23)×710,
=12÷2×710,
=6×710,
=4260;
(2)85×25+85×85-10×85,
=85×(25+85-10),
=25×100,
=2500;
(3)32×25×125,
=8×4×25×125,
=(8×125)×(4×25),
=1000×100,
=100000;
(4)37.8×19-9×37.8,
=(19-9)×37.8,
=10×37.8,
=378;
(5)8.7×101,
=8.7×(100+1),
=8.7×100+8.7×1,
=870+8.7,
=878.7;
(6)1÷(
÷
×
),
=1÷(
×
),
=1÷
,
=10.
=12÷2×710,
=6×710,
=4260;
(2)85×25+85×85-10×85,
=85×(25+85-10),
=25×100,
=2500;
(3)32×25×125,
=8×4×25×125,
=(8×125)×(4×25),
=1000×100,
=100000;
(4)37.8×19-9×37.8,
=(19-9)×37.8,
=10×37.8,
=378;
(5)8.7×101,
=8.7×(100+1),
=8.7×100+8.7×1,
=870+8.7,
=878.7;
(6)1÷(
| 3 |
| 5 |
| 8 |
| 5 |
| 4 |
| 15 |
=1÷(
| 3 |
| 8 |
| 4 |
| 15 |
=1÷
| 1 |
| 10 |
=10.
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