70 - 100 =
Tính nhẩm.
100 – 40 100 – 70 100 – 90
70+30+100+100
70 + 30 + 100 + 100 = 300
Ai tích mk mk tích lại
70+30+100+100=100+100+100
=300
55 +_______ = 100
________- 35 = 70
70 + 30 =________
A , -115 . B 374 . C -100 D - 239. E -124
100*70+100*30+100*0
Tính thuận tiện
100 */ 70 + 100 * 30 + 100 * 0
= 100 * ( 70 + 30 + 0 )
= 10000
****n nhe
100 x 70 + 100 x 30 x 100 x 0
= 100 x ( 70 + 30 + 0 )
= 100 x 100
= 10000
100 x 70 + 100 x 30 x 100 x 0
= 100 x ( 70 + 30 + 0 )
= 100 x 100
= 10000
30 + 70 + 80 + 20 + 100 + 100 + 800 =?
30 + 70 + 80 + 20 + 100 + 100 + 800
=(30 + 70) + (80 + 20) + 100 + 100 + 800
=100 + 100 +100 +100 + 800
=100 x 4 + 800
=400 + 800
=1200
30 + 70 + 80 + 20 + 100 + 100 + 800
= (30 + 70) + (80 + 20) + 100 + 100 + 800
= 100 + 100 + 100 + 100 + 800
= 100 . 4 + 800
= 400 + 800
= 1200
=( 30+70) + ( 80+20) + ( 100+100+800)
= 100 + 100 + 1000
= 200 + 1000
= 1200
100+100:10*20+70=
100-70=
TL
100-70
=30
nha
HT