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32 Speed Math for Kids
easy? Let’s try it. Twelve thousand, two hundred minus 100? Twelve
thousand, one hundred. Plus 25? Twelve thousand, one hundred
and twenty-fi ve. Easy.
So back to our example. Th is is how the completed problem looks:
+25
100 97 × 125 = 12,200 – 75 = 12,125 Answer
–3
25
With a little practice you should be able to solve these problems
entirely in your head. Practice with the problems below.
Test you rself
Tr y the se :
a) 98 × 145 = e) 98 × 146 =
b) 98 × 125 = f) 9 × 15 =
c) 95 × 120 = g) 8 × 12 =
d) 96 × 125 = h) 7 × 12 =
How did you do? The answers are:
a) 14,210 b) 12,250 c) 11,400 d) 12,000
e) 14,308 f) 135 g) 96 h) 84
Multiplying numbers in the circles
Th e rule for multiplying the numbers in the circles is:
When both circles are above the numbers or both circles
are below the numbers, we add the answer. When one
circle is above and one circle is below, we subtract.