Lesson details

Key learning points

1. In this lesson, we will use the formal written method to add decimal numbers and correct mistakes made with this method.

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5 Questions

Q1.
Which known fact will help me answer 30 + 40 and 0.03 + 0.04?
13 + 4 = 17
3 x 4 = 12
4 - 3 = 1
Correct answer: 7 = 3 + 4
Q2.
0.6 + 0.3 = ____
0.009
0.09
9
Q3.
If I know 4 + 5 = 9, then I know... (pick two)
Correct answer: 0.04 + 0.05 =
0.4 + 0.09 =
0.5 x 0.4 =
Correct answer: 0.9 - 0.4 =
Q4.
If I know 15 + 4 = 19, then I know... (pick two)
0.04 + 0.015 =
Correct answer: 0.15 + 0.04 =
0.15 + 0.4 =
Correct answer: 1.5 + 0.4 =
Q5.
What is 0.06 - 0.02?
0.004
0.4
4

5 Questions

Q1.
True or false: 0.160 + 7.820 = 7.98
False
Q2.
True or false: 8.180 + 9.160 = 17.34
False
Q3.
True or false: 0.160 + 7.820 = 7.92
True
Q4.
True or false: 1.830 + 0.487 = 2.317
False