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Subtraction Strategies: Counting On by tens to subtract: 130 – 80
Mr. Lee had 134 pieces of candy in a bowl. He gave away 58 pieces of candy.
How many pieces does he have left?
Math Mountains
Practice
9
- -
+54
9
54
Practice
- -
+57 57
7 + 5 =
3 2
12
10+2=12
Math MountainsFirst Grade
Third & Fourth Grades
Second Grade
7 + 5 =
32
10 + 2 = 12 4
6
2+
--
6 - = 2
6
3x
2
.
...
David has 5 marbles. Anna has 8 marbles. How many more marbles does Anna have?
David has 5 marbles. Anna has 8 marbles. How many fewer marbles does David have?
There are 15 fish in a tank. 12 are goldfish, the rest are angelfish. How many more goldfish are there than angelfish?
1.
2.
3.
21 x 4
4
20 + 1
4 x 20 = 80 80+ 4 84
17 x 4
4
17 = 10 + 7
40+28 68
40 28
4x1
=4
20=
4
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