Question

name

1. you want to find 53 - 19. which shows a way you should regroup 53?

a 5 tens and 3 ones
b 4 tens and 13 ones
c 4 tens and 3 ones
d 5 tens and 13 ones
daily math
7-1

1. lin has 26 more beads than moe. lin has 42 beads. how many beads does moe have? which shows the solution and how to check it?

a 24 beads; 24 + 18 = 42
b 22 beads; 22 + 20 = 42
c 16 beads; 16 + 26 = 42
d 12 beads; 12

1. what does this open number line show?

-10
-10
-10
33

Explanation:

Question 1

Step1: Understand regrouping for subtraction

To subtract \(53 - 19\), we need to regroup 53 because 3 ones is less than 9 ones. Regrouping means taking 1 ten from the tens place and converting it to 10 ones, so 5 tens and 3 ones becomes 4 tens and \(10 + 3 = 13\) ones.

Step2: Analyze the options

• Option A: 5 tens and 3 ones is the original number, no regrouping. Incorrect.
• Option B: 4 tens and 13 ones is the result of regrouping (taking 1 ten from 5 tens to make 13 ones). Correct.
• Option C: 4 tens and 3 ones is incorrect, we need 13 ones after regrouping. Incorrect.
• Option D: 5 tens and 13 ones is incorrect, we should have 4 tens after giving 1 ten to the ones place. Incorrect.

Step1: Understand the problem

Lin has 26 more beads than Moe, and Lin has 42 beads. So we need to find Moe's beads by subtracting 26 from 42, i.e., \(42 - 26\). To check, we can add Moe's beads and 26 to see if we get Lin's beads (42).

Step2: Analyze the options

• Option A: 24 beads. Check: \(24 + 18 = 42\), but we need to add 26, not 18. Incorrect.
• Option B: 22 beads. Check: \(22 + 20 = 42\), we need to add 26, not 20. Incorrect.
• Option C: 16 beads. Check: \(16 + 26 = 42\), which matches Lin's beads. Correct.
• Option D: 12 beads. The check part is not visible, but \(12 + 26 = 38

eq 42\). Incorrect.

Answer:

B

Question 2