When adding & subtracting, if the values are less than 1 we round to the nearest.....
half!
When adding and subtracting fractions, you need...
common denominators
When you subtract, you really...
add the opposite
When estimating with products and quotients, we use numbers that work well together. These are called....
compatible numbers
when the signs are the same, the answer is
positive
whole number
When adding and subtracting decimals, you must...
line up decimals
-1/4 - 1/2
-3/4
ESTIMATE
22.3 divided by 7
3
when the signs are different, the answer is...
negative
ESTIMATE:
7.85+12.1
20
-1/3+4/9
1/9
-1.6
-0.5(40.9)
-20
-3/8(-1/2)
3/16
ESTIMATE!
-.94+(-.58)
-1.5
-4 2/3 + (-3 1/2)
-8 1/6
1/8-2/3
-13/24
-153.5 divided by -24.9
6
-2 3/5(-1 1/3)
3 7/15
ESTIMATE
9/16-7/15
0
.43 + (-.42)
.01
-5 1/2 - 3 1/4
-8 3/4
-1/8(63)
-8
two problems!
9 divided by (-1 1/4)
-.4 divided by 1.6
-7 1/5
-.25