Rounding to the Nearest 10
Round 137 to the nearest ten.
140
Round 243 to the nearest hundred.
200
Use base ten blocks to add:
102+107=
209
Subtract using any strategy you want:
419-305
114
What is the rule for rounding?
If it's past the halfway point, round up!
Round 153 to the nearest ten.
150
Round 189 to the nearest hundred.
200
Use expanded form to add:
102+167=
100+0+2
100+60+7
200+60+9
269
Subtract using base ten blocks:
534-221
313
Name one of the strategies for adding or subtracting 3 digit numbers.
Base ten
expanded form
Regrouping/carrying
Partial sums
Round 241 to the nearest ten.
240
Round 874 to the nearest hundred.
900
317+173=
490
Subtract using expanded form:
728-295
433
How many ones equal a ten?
10 ones
Round 498 to the nearest ten.
500
Round 351 to the nearest hundred.
400
Add using expanded form:
204+278=
200+0+4
200+70+8
400+70+12 (add the ten in the number 12 to the tens place)
400+80+2
482
Subtract using base ten blocks:
970-625=
345
How many tens equal a hundred?
10
Round 949 to the nearest ten.
950
Round 903 to the nearest hundred.
900
317+283
600
Subtract using any strategy:
526-337=
189
Which of the following numbers round to 540 when rounded to the nearest 10? Choose all the correct answers.
A) 545
B) 534
C) 541
D) 535
E) 547
C) 541
D) 535