56 Speed Math for Kids
+11
+3
500 511 × 503 = 514
257,000
- 33
257,033 Answer
Let’s try one more.
989 × 994 =
We use 1,000 as the reference number.
1,000 989 × 994 =
–11
–6
Subtract crossways.
989 – 6 = 983
or
994 – 11 = 983
Multiply our answer by 1,000.
983 × 1,000 = 983,000
Multiply the numbers in the circles.
11 × 6 = 66
983,000 + 66 = 983,066
1,000 989 × 994 = 983,000
–11
–6 - 66
983,066 Answer