Vocabulary
A numner close to an exact value.
Estimate
3.6 x 102 =
360
Estimate:
4.18 x 6.86 =
4 x 7 = 28
3.8 is ____ of 38
1/10
0.9 x 0.4 =
0.36
A number that has one of more digits ot the right of the decimal point.
Decimal
7.2 x 103 =
Estimate:
3.6 x 9.8 =
4 x 10 = 40
0.45 is _____ of 45
1/100
0.5 x 0.7 =
0.35
To break into different parts
decompose
1.2 x 100 =
120
Estimate:
6.7 x 9.8 =
7 x 10 = 70
45 x 17 = 765
45 x 1.7 =
76.5
5 x 0.8 =
4.0 or 4
The answer when multiplying.
Product
1.9 x 104 =
19,000
Estimate by finding the RANGE:
4.93 x 7.88 =
4 x 7 = 28
5 x 8 = 40
16 x 89 = 1,424
16 x 0.89 =
14.24
6.7 x 0.5 =
3.35
The answer when subtracting.
Difference
3.5 x 1,000 =
3,500
Estimate by finding the RANGE:
16.12 x 3.55 =
16 x 3 = 48
82 x 67 = 5,494
82 x 6.7 =
549.4
3.6 x 4.7 =
16.92