Page 65 - Math;Steps 3a: resource masters

RM64

• Subtraction patterns • • 30:16

This machine halves
every number put in:

[I] Write down the numbers which will come out of the machine
when these are put in.

14 -----i. 12 -----i. 18 ------l •.

10 20 ----~ 16 ----..

This machine subtracts q
from every number put in:

(g] Write down the numbers which will come out of the machine
when these are put in.

10 ----. 14 ---. 17 ----~

lq -----i •.• 13 -----1•.• 20 ------l•.•

This machine subtracts 10
from every number put in:

00 Write down the numbers which will come out of the machine
when these are put in.

87 --- •.• 76 ---~ •. q2 ------1•.•.
15 --- •.• 66 --- •. ~ 5q ------1•.•.

~ Continue this pattern until you reach 3:

q3, 83, ...

Operating on numbers by mental recall.
Name
Date

© 1993 Collins Educational (an imprint of HarperCollinsPublishers) STEPS 3a