Page 47 - steps 3b.pdf

48
• Totals to 999 • • • • I base 10 materials I • Setting out sums • • • • • •
~:t.I.)"C).~ ~~~tl~~~
Remember to think:
PAGE 84 OJ Copy and complete these sums. the answer will be about .. ~
_.~
Saria and Anil are learning to add without apparatus.
Use base 10 materials to help. tv
a 523 + 57 b 607 + 181 c 345 + 449 y
d 567 + 408 e 179 + 791 f 625 + 368 •
W Write down which two sets added together make these totals. 400 + 30 + 6 436
Shaw how you work aut your answers. 100 + 20 + 3 + 123
a 380 b 981 c 785 500 + 50 + 9 - 559 - -9(6+3)
50 (30 + 20)
f 999
d 594 e 398 ccc _. 500 (400 + 100)
tens hundreds tens ones OJ Use Saria 's way to find the totals. 559
II mum co a 136 + 432 b 247+631 c 527 + 71
d 805 + 164
f 910 + 89
e 43 + 710
blue set green set I
[Ij Now use Anil's way to find the totals
tens hundreds tens ones far the sums inOJ .
nm 0 0 rn Use your favourite way to find the answers to these.
11111
JllI 1111 a 128 + 301 b 346 + 420 c 547 + 58
d 717 + 77
f 358 + 609
e 874 + 86
purple set red set
rn Work out the number which is double the number shawn in:
A calculator CHALLENGE
a the blue set b the green set c the red set. might help.
0 - 0 + 0 +
CHALLENGE
+ 0 -- 0 + 0 + 0
Write down pairs of numbers which add up to 999.
0 + 0 + 0 -- 876
• Rule The numbers must be between 400 and 600.
m ISTEPS 3b:36 1 I STEPS 3b:3S I rm1
rn [g] rn [g]

a 580 b 788 c 7q4 a green + red b green + purple a 136 .. 1 00 + 30 + 6 a 136 b 878 c 5q8
+ 432 .. 400 + 30 + 2 + 432
d q75 e q70 f qq3 c purple + red d blue + green d q6q e 753
500 + 60 + 8 .. 568 8 (2+6)
e blue + red f blue + purple b 878 c 5q8 d q6q 60 (30+30) f qqq
~ 500 (1 00+400)
Challenge e 753 f qqq 568
a 612 b 576 c 184
Find pairs of numbers between 400 Challenge
and 600 which add up to qqq. ~
Find at least five ways, using
For example: a 42q b 766 c 605
method in question 1, to make a
451 + 548 = qqq. d 7q4 e q60 f q67 total of 876. (1/3 b)
(1/3 b)