用你喜欢的方法计算下列各题(最后四题用简便方法计算). 1575-635+265 9800÷(49×25) 240÷80
用你喜欢的方法计算下列各题(最后四题用简便方法计算).1575-635+2659800÷(49×25)240÷80+71×12(57×35+43×35)÷14150+42...
用你喜欢的方法计算下列各题(最后四题用简便方法计算). 1575-635+265 9800÷(49×25) 240÷80+71×12 (57×35+43×35)÷14 150+42×37 480-(32+32÷4) 125×56 35×99+35 790-218-82 10200÷4÷25.
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(1)1575-635+265, =940+265, =1205; (2)9800÷(49×25), =9800÷1225, =8; (3)240÷80+71×12, =3+852, =855; (4)(57×35+43×35)÷14, =(1995+1505)÷14, =3500÷14, =250; (5)150+42×37, =150+1554, =1704; (6)480-(32+32÷4), =480-(32+8), =480-40, =440; (7)125×56, =125×8×7, =1000×7, =7000; (8)35×99+35, =(99+1)×35, =100×35, =3500; (9)790-218-82, =790-(218+82), =790-300, =490; (10)10200÷4÷25, =10200÷(4×25), =10200÷100, =102. |
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