Tính nhanh a) 46+17+54 b) 4 x 37 x 25 c) 87 x 36 + 87 x 64 20/07/2021 Bởi Raelynn Tính nhanh a) 46+17+54 b) 4 x 37 x 25 c) 87 x 36 + 87 x 64
a) `46 + 17 + 54` `= (46 + 54) + 17` `= 100 + 17 = 117` b) `4 × 47 × 25` `= (4 × 25) × 37` `= 100 × 37` `= 3700` c) `87× 36 + 87 × 64` `= 87 × (36 + 64)` `= 87 × 100 = 8700` Bình luận
a) 46 + 17 + 54 = (46 +54) + 17 = 100 + 17 = 117 b) 4 × 37 × 25 = (4 × 25) × 37 = 100 × 37 = 3700 c) 87 × 36 + 87 × 64 = 87 × (36 + 64) = 87 × 100 = 8700 Bình luận
a) `46 + 17 + 54`
`= (46 + 54) + 17`
`= 100 + 17 = 117`
b) `4 × 47 × 25`
`= (4 × 25) × 37`
`= 100 × 37`
`= 3700`
c) `87× 36 + 87 × 64`
`= 87 × (36 + 64)`
`= 87 × 100 = 8700`
a) 46 + 17 + 54
= (46 +54) + 17
= 100 + 17
= 117
b) 4 × 37 × 25
= (4 × 25) × 37
= 100 × 37
= 3700
c) 87 × 36 + 87 × 64
= 87 × (36 + 64)
= 87 × 100
= 8700