Math facts
When ordering decimals to add or subtract, what do we use to line up the numbers?
a) the smaller number
b) place value
c) doesn't matter
d) hundredths
b) place value
Subtract.
0.90 - 0.80
= 0.10
Add.
6.5 + 3.2
= 9.7
Order these decimals from greatest to least
0.5, 0.4, 0.3
0.5 > 0.4 > 0.3
When subtracting, it doesn't matter if the greater number is on the top or bottom
a) true
b) false
false
Convert fractions into decimals and subtract.
2/10 - 8/10
= 0.6
Add.
2.10 + 3.25
= 5.35
Order these decimals from greatest to least
0.7, 0.2, 0.6
0.7 > 0.6 > 0.2
When comparing and ordering decimals we should convert them all into either (tenths, hundredths, thousandths)
a) true
b) false
a) true
we need to convert them to make them easier to compare and order
Convert fractions into a decimals and subtract.
30/100 - 6/10
hint: should both be decimal hundredths before subtracting!
= 0.30
Convert fractions into decimals and add.
2/100 + 3/100
= 0.05
Order these decimals from greatest to least
0.30, 4/100, 0.03
0.30 > 0.04 > 0.03
when subtracting a whole number from a decimal (2- 0.53) what do we first need to do to the 2?
make it have two digits to the right of the decimal point, to represent that we have nothing in our tenths and nothing in our hundredths, we can use a zero.
2.00
Subtract.
16 - 0.40
= 15.60
add.
3 + 0.40
= 3.40
Order these decimals from greatest to least
0.040, 0.004, 400/1000
0.400 > 0.040 > 0.004
When subtracting a decimal from a whole number, what is the first step?
15 - 0.34
add two digits to the right of the decimal point in order to line up our place values.
15.00 - 0.34
Aria wants to build a diving board. The length of the diving board is 0.75 m. She has 0.9 m of diving board material. How much extra material does she have?
Aria has 0.15 m of diving board material left over
Kyler is crocheting a sweater. He needs 0.30 cm of green yarn and 0.50 cm of pink yarn. In total, how much yarn will Kyler need to crochet his sweater?
Kyler will need 0.80 cm of yarn to crochet his sweater.
Order these decimals from greatest to least
5/1000, 0.050, 500/1000
0.500 > 0.050 > 0.005