Toán Tính nhanh: a, 12 x 5 + 20 x 2 b, 45 x 2 + 2 × 5 07/09/2021 By Eliza Tính nhanh: a, 12 x 5 + 20 x 2 b, 45 x 2 + 2 × 5
a, 12 x 5 + 20 x 2 = 12 x 5 + 5 x 4 x 2= 5 x (12 + 8)= 5 x 20= 100 b, 45 x 2 + 2 × 5 = 2 x ( 45 + 5 ) = 2 x 50 = 100 hok tốt Trả lời
a, 12 x 5 + 20 x 2 = 12 x 5 + 5 x 4 x 2 = 12 x 5 + 5 x 8 = 5 x (12 + 8) = 5 x 20 = 100 b, 45 x 2 + 2 × 5 = 2 x (45 + 5) = 2 x 50 = 100 Trả lời
a, 12 x 5 + 20 x 2
= 12 x 5 + 5 x 4 x 2
= 5 x (12 + 8)
= 5 x 20
= 100
b, 45 x 2 + 2 × 5
= 2 x ( 45 + 5 )
= 2 x 50
= 100
hok tốt
a, 12 x 5 + 20 x 2
= 12 x 5 + 5 x 4 x 2
= 12 x 5 + 5 x 8
= 5 x (12 + 8)
= 5 x 20
= 100
b, 45 x 2 + 2 × 5
= 2 x (45 + 5)
= 2 x 50
= 100