Page 72 - Math;Steps 3a: resource masters
P. 72
RM71
• Pattern ••••••• 3a:18
CD Fill in the missing numbers so that each line adds up to
the number at the top of the box.
Check, using a calculator.
a 25 b 38 c 43
20 + + 8 + 3
10 + + 18 +
0 + 10 + 20 +
+ +
0+43
d Rule: first two numbers e Rule: first 2 numbers
are odd and the same: are even and the same:
17 18
7 + 7 + 8 + +
+ 5 + + +
+ + 11 + 4 +
1 + + + + 14
Make up 4 more boxes.
f Rule: first 3 numbers Use a calculator!
are the same:
Try larger numbers!
1q Invent new rules!
+ + + 1
+ + + 4
4 + + + 7
+ + + 10
+ + + 13
+ + 1 + 16
Equivalent forms of two-digit numbers.
Name Materials: calculators
Date
© 1993 Collins Educational (an imprint of HarperCollinsPublishers) STEPS 3a
