79×101减79的简便计算方法
79×101减79的简便计算方法
79×101减79的简便计算方法
79×101减79
=79*(101-1)
=79*100
=7900
79×107-79的简便计算方法
79×107-79
=79×(107-1)
=79×106
=79×(100+6)
=79×100+79×6
=7900+474
=8374
79×99-79的简便计算方法
79×99-79
=79*(99-1)
=79*98
=79*(100-2)
=79*100-79*2
=7900-158
=7742
3679+79+7954的简便计算方法
3679+79+7954
=79x(36+1+54)
=79x91
=80x91-91
=7280-100+9
=7189
(59/79)*77的简便计算方法
你好,tianya8325 :
(59/79)×77
=(59/79)×(79-2)
=(59/79)×79-(59/79)×2
=59-1又39/79
=57又40/79
79乘625的简便计算方法怎么算?
79*625
=(80-1)*625
=80*625-625
=4*625*20-625
=2500*20-625
=50000-625
=49375
奥数(79 78/79)÷79用简便计算方法怎么算?
奥数(79 78/79)÷79用简便计算方法怎么算?
=1+78/(79x79)
=1+78/6241
=1又6241分之78
1十2十3……十79十80的简便计算方法
1 + 2 + 3……+ 79 + 80
= (1+80) + (2+79) + (3+78) + ... + (40+41)
= 81 + 81 + 81 + ... + 81
= 81 × 40
= 3240
36.78减21.55减8.45简便计算方法
6.78
-
解:
36.78-21.55-8.45
=36.78-(21.55+8.45)
=36.78-30
=6.78
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