用递等式计算,能用简便方法的用简便方法计算. 45-20×3÷4 26+14×(70-30) 125×(8×4)203×24 10
用递等式计算,能用简便方法的用简便方法计算.45-20×3÷426+14×(70-30)125×(8×4)203×24108-(83+360÷60)153×8-8×531...
用递等式计算,能用简便方法的用简便方法计算. 45-20×3÷4 26+14×(70-30) 125×(8×4)203×24 108-(83+360÷60) 153×8-8×53 180÷[36÷(12+6)]75×99+75.
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(1)45-20×3÷4, =45-60÷4, =45-15, =30; (2)26+14×(70-30), =26+24×40, =26+960, =986; (3)125×(8×4), =125×8×4, =1000×4, =4000; (4)203×24, =(200+3)×24, =200×24+3×24, =4800+72, =4872; (5)108-(83+360÷60), =108-(83+6), =108-89, =19; (6)153×8-8×53, =(153-53)×8, =100×8, =800; (7)180÷[36÷(12+6)], =180÷[36÷18], =180÷2, =90; (8)75×99+75, =75×(99+1), =75×100, =7500. |
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