Near a mountain peak, Emek and Luna found a signal station that needed the code 426. Its control panel had spaces for hundreds, tens, and ones. Emek broke 426 into 400 + 20 + 6. Luna arranged matching blocks to show 4 hundreds, 2 tens, and 6 ones. Before entering the code, they checked that the blocks made 426, not 462. Their model was correct, so they entered 426. The station flashed to life and sent a bright signal across the mountains.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
Look at the places of the digits 2 and 6 in 426.
A hiker says the code 426 has 4 hundreds, 6 tens, and 2 ones. What mistake did the hiker make?
The hiker switched the tens and ones.The hiker switched the hundreds and tens.The hiker used too many hundreds.The hiker made no mistake.Correct! In 426, the 2 is in the tens place and the 6 is in the ones place.
Try again. Check which digit is in the tens place and which is in the ones place.
Next🎉 Congrats! You got this question!
Hint
The digit 2 is in the tens place.
The correct signal code is 426. What is the value of the digit 2 in this code?
Correct! The digit 2 has a value of 20.
Try again. Think about the value of 2 tens.
Next🎉 Congrats! You got this question!
Hint
Use 4 hundreds, 2 tens, and 6 ones.
Emek and Luna checked that their blocks made 426, not 462. Which expanded form correctly proves that their blocks made 426?
400 + 60 + 2400 + 20 + 640 + 20 + 6400 + 2 + 60Correct! 400 + 20 + 6 makes 426.
Try again. Match each digit in 426 with its correct place value.
Next🎉🎉🎉🎉🎉🎉🎉🎉
🎉 Congrats! You finished this challenge set!
