Remember: Take away the tens and the ones, row by row. Each row works on its own when it has enough beads.
Read and answer
Read the story, then answer.
The bead stallIt was market day, and Ben had a bead stall. Under the counter sat a box with 86 beads in it: eight bundles of ten and six loose ones. On the frame the top row showed eight tens and the bottom row showed six ones. A shopper asked for 24 beads, which is two bundles and four loose ones. Ben took away two tens, so eight tens became six. Then he took away four ones, so six ones became two. The ones row never touches the tens row, because each row works alone. Six tens and two ones is 62.
1
How many beads were left in Ben's box after the shopper took 24?
2
Which row did Ben take beads from first?
the ones rowthe tens rowboth at once
3
When nothing needs to be borrowed, each row works on its own.
TrueFalse
4
Taking the ones first gives a different answer from taking the tens first.
TrueFalse
On the frame
Beads slid back to the left are taken away.
5
Slide 2 tens back from this frame. How many tens are left?
1026
6
The frame shows 89. Take away 36. 89 - 36 =
7
The frame shows 93. Take away 60. 93 - 60 =
8
Which frame shows what is left of 62 take away 31? The top row is tens.
ABC
9
58 - 23 =
10
Number Ben's steps for 86 - 24.
Read six tens and two ones
Slide four ones back
Slide two tens back
Put 86 on the frame
Fix it and stretch
11
Circle every sum that needs no borrowing.
68 - 2372 - 2896 - 5285 - 39
12
Ben says 86 - 24 = 66. What did he forget?
to take away the onesto take away the tensto put 86 on the frame
13
Ben had 99 beads. He sold 24, then 31. 99 - 24 - 31 =
14
Draw the beads that are left for 86 - 24.
15
Say why 72 - 28 needs a new trick.
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Answer key · Set A
Take away row by row
162 86 take away 24: 8 tens take away 2 tens leaves 6 tens, and 6 ones take away 4 ones leaves 2 ones.
2the tens row The tens row is the big place, so Ben started there. The order does not change the answer.
3True The ones row never touches the tens row, so either order works.
4False Ben tried it both ways and got sixty-two both times.
56 Eight tens take away two tens leaves six tens.
653 8 tens take away 3 tens leaves 5 tens. 9 ones take away 6 ones leaves 3 ones.
733 Only the tens row moves: 9 tens take away 6 tens leaves 3 tens, and the 3 ones stay.
8C 62 take away 31: 3 tens and 1 one are left.
935 5 tens take away 2 tens is 3 tens. 8 ones take away 3 ones is 5 ones.
104, 3, 2, 1 Set the number, take away the tens, take away the ones, then read.
1168 - 23, 96 - 52 In 68 - 23 and 96 - 52 every ones digit is big enough. 2 is too few for 8, and 5 is too few for 9.
12to take away the ones 66 is 86 take away 20. Ben left the 4 ones on the frame. The answer is 62.
1344 99 - 24 = 75. Then 75 - 31 = 44.
15Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.