645-(235+299)简便方法?
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645-(235+299)简便方法如下:
645-(235+299)
=645-(235+299+1)+1
=645-535+1
=111
645-(235+299)
=645-(235+299+1)+1
=645-535+1
=111
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645-(235+299)简便方法如下:
645-(235+299)
=(645-235)-299
=420-299
=420-299-1+1
=420-300+1
=120+1
=121
645-(235+299)
=(645-235)-299
=420-299
=420-299-1+1
=420-300+1
=120+1
=121
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645一(235十299十1)十1=645一535十1=111
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您好,很高兴为您解答问题!以下是我为您提供的解答内容:
(1)355+260+140+245 =(355+245)+(260+140) =600+400, =1000; (2)98×101 =90×(100+1), =90×100+98, =9000+98, =9098; (3)48×125 =6×(8×125), =6×1000, =6000; (4)645-180-245 =645-245-180, =400-180, =220; (5)38×99+38 =(99+1)×38, =100×38, =3800; (6)3500÷14÷5 =3500÷(14×5), =3500÷70, =50; (7)175×56+25×56 =(175+25)×56, =200×56, =11200; (8)50×25×20×40 =50×20×(25×40), =1000×1000, =1000000.
(1)355+260+140+245 =(355+245)+(260+140) =600+400, =1000; (2)98×101 =90×(100+1), =90×100+98, =9000+98, =9098; (3)48×125 =6×(8×125), =6×1000, =6000; (4)645-180-245 =645-245-180, =400-180, =220; (5)38×99+38 =(99+1)×38, =100×38, =3800; (6)3500÷14÷5 =3500÷(14×5), =3500÷70, =50; (7)175×56+25×56 =(175+25)×56, =200×56, =11200; (8)50×25×20×40 =50×20×(25×40), =1000×1000, =1000000.
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(1)355+260+140+245 =(355+245)+(260+140) =600+400, =1000; (2)98×101 =90×(100+1), =90×100+98, =9000+98, =9098; (3)48×125 =6×(8×125), =6×1000, =6000; (4)645-180-245 =645-245-180, =400-180, =220; (5)38×99+38 =(99+1)×38, =100×38, =3800; (6)3500÷14÷5 =3500÷(14×5), =3500÷70, =50; (7)175×56+25×56 =(175+25)×56, =200×56, =11200; (8)50×25×20×40 =50×20×(25×40), =1000×1000, =1000000.
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