Page 40 - steps 3b.pdf
P. 40
RM45
Subtraction (1) 3b:ll
rn Keep going round the subtraction loop.
START
Use base 1 0 pieces hundreds tens ones
•• "
to show 457 on D D
o 0
your board. ~UU o 0
••
Take away five pieces.
For example
UU 0
Work out the value
of the five pieces.
Work out the value hundreds tens ones
••
of the pieces left o 0
o 0
on the board. ~ o 0
••
Write down your result.
For example, 457 - 41 = 416.
YES Try NO
again?
Subtracting 3-dlglt numbers assisted by apparatus;
working systematically.
© 1993 Collins Educational (an imprint of HarperCollinsPublishers) STEPS 3b Materials: Base 10 materials; baseboard
