能简算的要简算7.28-(1.28+0.25)2.25×4.8+77.5×0.488×4×12.5×0.25  ...
能简算的要简算7.28-(1.28+0.25)2.25×4.8+77.5×0.488×4×12.5×0.2536×(29+712)...
能简算的要简算7.28-(1.28+0.25)2.25×4.8+77.5×0.488×4×12.5×0.25 36×(29+712)
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(1)7.28-(1.28+0.25)
=7.28-1.28-0.25
=6-0.25
=5.75;
(2)2.25×4.8+77.5×0.48
=2.25×10×0.48+77.5×0.48
=22.5×0.48+77.5×0.48
=(22.5+77.5)×0.48
=100×0.48
=48;
(3)8×4×12.5×0.25
=(8×12.5)×(4×0.25)
=100×1
=100;
(4)36×(
+
)
=36×
+36×
=8+21
=29
=7.28-1.28-0.25
=6-0.25
=5.75;
(2)2.25×4.8+77.5×0.48
=2.25×10×0.48+77.5×0.48
=22.5×0.48+77.5×0.48
=(22.5+77.5)×0.48
=100×0.48
=48;
(3)8×4×12.5×0.25
=(8×12.5)×(4×0.25)
=100×1
=100;
(4)36×(
2 |
9 |
7 |
12 |
=36×
2 |
9 |
7 |
12 |
=8+21
=29
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