5乘以8×98简便运算

Question

899＋344简便运算 1248÷24简便运算

Answer 1

5*8×98简便运算
解，得：
==40*（100-2）
==4000-80
==3920

899＋344简便运算
解，得：
==（900-1）+（300+44）
==900+300+43
==1200+43
==1243

1248÷24简便运算
解，得：
==1248/(12*2)
==104/2
==52

Answer 2

简便运算

5 × 8 × 98
= 40 × (100 - 2)
= 4000 - 80
= 3920

Answer 3

5×8×98
=5×8×(100-2)
=40×(100-2)
=40×100-40×2
=4000-80
=3920

899＋344
=344+900-1
=1244-1
=1243

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899＋344简便运算

追答

899＋344
=344+900-1
=1244-1
=1243

1248÷24
=1248÷(12×2)
=1248÷12÷2
=104÷2
=52

追问

1248÷24简便运算

追答

1248÷24
=1248÷(12×2)
=1248÷12÷2
=104÷2
=52

Answer 4

5×8×98
=5×8×(100-2)[98=100-2]
=40×(100-2)
=40×100-40×2[乘法分配律]
=4000-80
=3920
望采纳

Answer 5

5×8×98
=40×98
=40×(100-2)
=40×100-40×2
=4000-80
=3920

899＋344
=(900-1)+344
=(900+343)+(1-1)
=1243追问

1248÷24简便运算

追答

1248÷24
=1248÷4÷6
=312÷6
=52

本回答被提问者采纳