
计算:(1)-9+12-3+8(2)-20+(-14)-(-18)-13(3)48×(-16+34?112) (4)(-81)÷94×49÷(-1
计算:(1)-9+12-3+8(2)-20+(-14)-(-18)-13(3)48×(-16+34?112)(4)(-81)÷94×49÷(-16)...
计算:(1)-9+12-3+8(2)-20+(-14)-(-18)-13(3)48×(-16+34?112) (4)(-81)÷94×49÷(-16)
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(1)原式=-9-3+12+8
=-12+20
=8;
(2)原式=-20-14+18-13
=-20-14-13+18
=-47+18
=-29;
(3)原式=48×(-
)+48×
-48×
=-8+36-4
=24;
(4)原式=81×
×
×
=1.
=-12+20
=8;
(2)原式=-20-14+18-13
=-20-14-13+18
=-47+18
=-29;
(3)原式=48×(-
1 |
6 |
3 |
4 |
1 |
12 |
=-8+36-4
=24;
(4)原式=81×
4 |
9 |
4 |
9 |
1 |
16 |
=1.
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