tinh nhanh a( 2400 +1200 ) :12 b (1800-3000:60 c 305+95 d 36.14+36.86 e 35.35+25.74=25
tinh nhanh a( 2400 +1200 ) :12 b (1800-3000:60 c 305+95 d 36.14+36.86 e 35.35+25.74=25
By Delilah
By Delilah
tinh nhanh a( 2400 +1200 ) :12 b (1800-3000:60 c 305+95 d 36.14+36.86 e 35.35+25.74=25
Đáp án:
a) ( 2400 +1200 ) :12
=2400:12+1200:12
=200+1000
=1200
b) (1800-3000):60
=1800:60-3000:60
=30-50
=-20
c) 305+95
=300+100
=400
d) 36.14+36.86
=36.(14+86)
=36.100
=3600
Giải thích các bước giải:
a/ ( 2400 +1200 ) :12
=2400:12+1200:12
=200+1000
=1200
b/ (1800-3000):60
=1800:60-3000:60
=30-50
=-20
c/ 305+95
=300+100
=400
d/ 36.14+36.86
=36.(14+86)
=36.100
=3600