Toán Lớp 3: a) 60×3+9=
b)55×6+9×10=
c)128 : 4=
d) 2×100:20=
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Toán Lớp 3: a) 60×3+9=
b)55×6+9×10=
c)128 : 4=
d) 2×100:20=
Comments ( 2 )
a) 60 xx 3 + 9
= 180 + 9
= 189
b) 55 xx 6 + 9 xx 10
= 330 + 90
= 420
c) 128 : 4
= 32
d) 2 xx 100 : 200
= 200 : 200
= 1
a) 60 xx 3 + 9
= ( 60 xx 3) + 9
= 180 + 9
= 189
b) 55 xx 6 + 9 xx 10
= ( 55 xx 6) + ( 9 xx 10)
= 330 + 90
= 420
c) 128 : 4
= 32
d) 2 xx 100 : 20
= ( 2 xx 100) : 20
= 200 : 20
= 10