Across Zeros
100-46=
54
What is a hundreds block called?
A flat
Using your tens blocks, show me what 256 looks like.
2 flats, 5 rods, 6 units
What place value do you begin subtracting?
937-652
285
200-124=
76
What is a tens block called?
A rod
436-123=
313
234-156=
78
725-247= 478
Is this true? Yes or no and why?
Yes, because you have to start at the ones place value to subtract. Since you can not subtract 7 from 5 you must borrow from the tens place. Since you are unable to subtract your tens place you must borrow from the hundreds place and then you can subtract. Which makes the answer 247 correct
300-154=
146
What is a ones block called?
A unit
100-43
57
589-296=
293
521-289=368
Is this true? Yes or no and why?
No, because you have to start at the ones place value to subtract. Since you can not subtract 9 from 1 you must borrow from the tens place. Since you are unable to subtract your tens place you must borrow from the hundreds place and then you can subtract.
500-237=
263
How many blocks are in a rod?
10
457-142=
315
732-275=
457
948-579=
369
700-498=
202
How many blocks are in a flat?
100
897-367=
530
911-199=
712
1000-510=
490