Page 18 - STEPS MATHEMATICS 4A
P. 18
Addition trios
Jameela wanted to find the total of 6, 8 and 4.
She wrote down 6 + 4 + 8 = 18 because she
found this the easiest order to add the numbers.
Write these in the order you find easiest to add
and find the totals.
a 8, 7 and 2 b 9, 9 and 1 c 7, 5 and 5
d 6, 2 and 8 e 4, 7 and 7 f 3, 8 and 4
Copy and complete these by finding the missing numbers.
d9+8+1=Jj 68+^+4
6 = 17 h9+J||+6
On this addition wheel,
the three numbers on the spokes
total the number inside.
Design addition wheels, each with 18 inside, using these rules.
a Three different even 1-digit numbers on the spokes.
b Two odd and one even 1-digit numbers on the spokes.
c The same number on every spoke.
d The number on each spoke can be divided exactly by 3.
e The number on each spoke is a different multiple of 2.
f One 2-digit number and two 1-digit numbers on the spokes.
