用简便方法记算45乘以99加45等于几
用简便方法记算45乘以99加45等于几
用简便方法记算45乘以99加45等于几
45*99+45
=45*(99+1)
=45*100
=4500
1.25乘以99加1.25简便记算
(1/4-1/4×99)÷25/24 =1/4×(1-99)×24/25 =1/4×(-98)×24/25 =-24.5×24/25 =-588/25
45乘以15加56乘以15减15=多少简便方法计算
45乘以15加56乘以15减15
=15x(45+56-1)
=15x100
=1500
199乘以45的简便方法
199乘以45
=(200-1)*45
=200*45-45
=9000-45
=8955
308乘以45的简便方法
308乘以45
=(300+8)*45
=300*45+8*45
=13500+360
=13860
9.8乘以45的简便方法
解9.8×45
=9.8×5×9
=49×9
=49×(10-1)
=490-49
=441
222乘以45用简便方法计算题及
222x45
=(200+20+2)x45
=9000+900+90
=9990
25×16*125用脱式简便方法记算
25×16×125
=(25×2)×(8×125)
=50×1000
=50000
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168÷3+24×12用简便方法记算
168÷3+24×12
=56+288
=344
116*4+284*4用简便方法记算
116*4+284*4
=(116+284)x4
=400x4
=1600