题目内容
| 62.8×19-8×62-62 | 3.64×[1÷(2-2.09)] |
| 1.9-1.9×(1.9-1.9) | (1-1%×70)÷0.32O |
(1)62.8×19-8×62-62
=1193.2-496-62,
=635.2;
(2)3.64×[1÷(2-2.09)]
=3.64×[1÷(-0.09)],
=
×(-
),
=-
;
(3)1.9-1.9×(1.9-1.9)
=1.9-1.9×0,
=1.9-0,
=1.9;
(3)(1-1%×70)÷0.32O
=(1-0.7)÷
,
=
×
,
=
.
=1193.2-496-62,
=635.2;
(2)3.64×[1÷(2-2.09)]
=3.64×[1÷(-0.09)],
=
| 91 |
| 25 |
| 100 |
| 9 |
=-
| 364 |
| 9 |
(3)1.9-1.9×(1.9-1.9)
=1.9-1.9×0,
=1.9-0,
=1.9;
(3)(1-1%×70)÷0.32O
=(1-0.7)÷
| 8 |
| 25 |
=
| 3 |
| 10 |
| 25 |
| 8 |
=
| 15 |
| 16 |
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