脱式计算(能简算的要简算). 2.25×1.8+12.5×0.18 &...
脱式计算(能简算的要简算).2.25×1.8+12.5×0.187.28-(1.28+0.25)2÷85×2524[1-(13-14)]×243.68-0.82-0.18...
脱式计算(能简算的要简算). 2.25×1.8+12.5×0.18 7.28-(1.28+0.25) 2÷85×2524 [1-(13-14)]×24 3.68-0.82-0.18 2÷23-23÷2.
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(1)2.25×1.8+12.5×0.18
=(2.25+1.25)×1.8
=4×1.8
=7.2;
(2)7.28-(1.28+0.25)
=7.28-1.28-0.25
=6-0.25
=5.75;
(3)2÷
×
=2×
×
=
;
(4)[1-(
-
)]×24
=1×24-(
×24-
×24)
=24-(8-6)
=24-2
=22;
(5)3.68-0.82-0.18
=3.68-(0.82+0.18)
=3.68-1
=2.68;
(6)2÷
-
÷2
=3-
=2
.
=(2.25+1.25)×1.8
=4×1.8
=7.2;
(2)7.28-(1.28+0.25)
=7.28-1.28-0.25
=6-0.25
=5.75;
(3)2÷
8 |
5 |
25 |
24 |
=2×
5 |
8 |
25 |
24 |
=
125 |
96 |
(4)[1-(
1 |
3 |
1 |
4 |
=1×24-(
1 |
3 |
1 |
4 |
=24-(8-6)
=24-2
=22;
(5)3.68-0.82-0.18
=3.68-(0.82+0.18)
=3.68-1
=2.68;
(6)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
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